Features

Everything you need for a premium Markdown reading experience, nothing you don't.

Reading Experience

GitHub-Style Rendering
Faithful reproduction of GitHub's Markdown rendering, so your documents look exactly as they would on GitHub.
Extended Syntax Support
Tables, task lists, strikethrough, autolinks, and all the GitHub Flavored Markdown extensions you rely on.
GitHub Alerts
Support for NOTE, TIP, IMPORTANT, WARNING, and CAUTION callouts with appropriate styling.
YAML Frontmatter
Beautifully styled, collapsible frontmatter tables that display your document metadata elegantly.
Auto-Reload
Documents automatically refresh when files change on disk, keeping your view up-to-date.
GitHub-style Markdown rendering

GitHub-Style Rendering

GitHub Alerts support

GitHub Alerts

Code & Diagrams

Syntax Highlighting
Beautiful code highlighting powered by highlight.js with a convenient copy button on every code block.
Mermaid Diagrams
Interactive Mermaid diagrams with zoom, pan, and the ability to copy diagrams as images.
KaTeX Math
Render mathematical expressions beautifully with KaTeX support for inline and block math.
Syntax highlighting

Syntax Highlighting

KaTeX math rendering

KaTeX Math

Mermaid diagram interaction demo

Interactive Mermaid diagrams with zoom and pan

Navigation & Organization

File Explorer Sidebar
Built-in file explorer with a resizable sidebar for browsing your Markdown files.
Quick Access Bookmarks
Pin frequently used files and directories for instant access.
Table of Contents
Automatic TOC panel generated from your document's headings for easy navigation.
Directory History
Navigate back and forward through your browsing history with keyboard shortcuts.
Live Link Navigation
Click links to other Markdown documents and navigate seamlessly between files.
File explorer sidebar demo

File Explorer Sidebar

Table of contents panel

Table of Contents Panel

Search & Discovery

⌘FFind in Page

Quick search within the current document with highlight navigation.

Pinned Search

Persistent multi-color highlighting that stays visible as you navigate.

Find in page

Find in Page

Pinned search with multi-color highlights

Pinned Search

Window & Tab Management

Tab Support

Open multiple documents in tabs for easy switching.

Multi-Window

Open documents in new windows, including separate windows for diagrams.

Drag & Drop

Drop files onto Arto to open them, or drag tabs between windows.

Context Menus

Right-click menus for tabs, sidebar, and content with useful actions.

Multi-window support

Multi-Window Support

Customization

Dark Mode

Beautiful dark theme that syncs with your system preferences.

⌘+⌘-Zoom

Adjust text size with keyboard shortcuts or trackpad gestures.

Preferences

Configure sidebar, TOC, and other settings to your liking.

Keyboard Shortcuts

O
Open file
F
Find in page
T
New tab
W
Close tab
+
Zoom in
-
Zoom out
0
Reset zoom
,
Preferences
[
Navigate back
]
Navigate forward
B
Toggle sidebar
R
Reload document